src/modules/m_cban.cpp

   1 /*      +------------------------------------+
   2  *      | Inspire Internet Relay Chat Daemon |
   3  *      +------------------------------------+
   4  *
   5  * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                    E-mail:
   7  *              <brain@chatspike.net>
   8  *              <Craig@chatspike.net>
   9  *                <omster@gmail.com>
  10  *
  11  * Written by Craig Edwards, Craig McLure, and others.
  12  * This program is free but copyrighted software; see
  13  * the file COPYING for details.
  14  *
  15  * ---------------------------------------------------
  16  */
  17
  18 #include <algorithm>
  19 #include "users.h"
  20 #include "channels.h"
  21 #include "modules.h"
  22 #include "configreader.h"
  23 #include "inspircd.h"
  24
  25 /* $ModDesc: Gives /cban, aka C:lines. Think Q:lines, for channels. */
  26
  27 class CBan : public classbase
  28 {
  29 public:
  30         irc::string chname;
  31         std::string set_by;
  32         time_t set_on;
  33         long length;
  34         std::string reason;
  35
  36         CBan()
  37         {
  38         }
  39
  40         CBan(irc::string cn, std::string sb, time_t so, long ln, std::string rs) : chname(cn), set_by(sb), set_on(so), length(ln), reason(rs)
  41         {
  42         }
  43 };
  44
  45 bool CBanComp(const CBan &ban1, const CBan &ban2);
  46
  47 typedef std::vector<CBan> cbanlist;
  48
  49 /* cbans is declared here, as our type is right above. Don't try move it. */
  50 cbanlist cbans;
  51
  52 class cmd_cban : public command_t
  53 {
  54  public:
  55         cmd_cban(InspIRCd* Me) : command_t(Me, "CBAN", 'o', 1)
  56         {
  57                 this->source = "m_cban.so";
  58                 this->
  59                 syntax = "<channel> [<duration> :<reason>]";
  60         }
  61
  62         CmdResult Handle(const char** parameters, int pcnt, userrec *user)
  63         {
  64                 /* syntax: CBAN #channel time :reason goes here */
  65                 /* 'time' is a human-readable timestring, like 2d3h2s. */
  66
  67                 if(pcnt == 1)
  68                 {
  69                         /* form: CBAN #channel removes a CBAN */
  70                         for (cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
  71                         {
  72                                 if (parameters[0] == iter->chname)
  73                                 {
  74                                         unsigned long remaining = (iter->set_on + iter->length) - ServerInstance->Time();
  75                                         user->WriteServ( "386 %s %s :Removed CBAN with %lu seconds left before expiry (%s)", user->nick, iter->chname.c_str(), remaining, iter->reason.c_str());
  76                                         cbans.erase(iter);
  77                                         break;
  78                                 }
  79                         }
  80                 }
  81                 else if (pcnt >= 2)
  82                 {
  83                         /* full form to add a CBAN */
  84                         if (ServerInstance->IsChannel(parameters[0]))
  85                         {
  86                                 // parameters[0] = #channel
  87                                 // parameters[1] = 1h3m2s
  88                                 // parameters[2] = Tortoise abuser
  89                                 long length = ServerInstance->Duration(parameters[1]);
  90                                 std::string reason = (pcnt > 2) ? parameters[2] : "No reason supplied";
  91
  92                                 cbans.push_back(CBan(parameters[0], user->nick, ServerInstance->Time(), length, reason));
  93
  94                                 std::sort(cbans.begin(), cbans.end(), CBanComp);
  95
  96                                 if(length > 0)
  97                                 {
  98                                         user->WriteServ( "385 %s %s :Added %lu second channel ban (%s)", user->nick, parameters[0], length, reason.c_str());
  99                                         ServerInstance->WriteOpers("*** %s added %lu second channel ban on %s (%s)", user->nick, length, parameters[0], reason.c_str());
 100                                 }
 101                                 else
 102                                 {
 103                                         user->WriteServ( "385 %s %s :Added permenant channel ban (%s)", user->nick, parameters[0], reason.c_str());
 104                                         ServerInstance->WriteOpers("*** %s added permenant channel ban on %s (%s)", user->nick, parameters[0], reason.c_str());
 105                                 }
 106                         }
 107                         else
 108                         {
 109                                 user->WriteServ( "403 %s %s :Invalid channel name", user->nick, parameters[0]);
 110                                 return CMD_FAILURE;
 111                         }
 112                 }
 113
 114                 return CMD_SUCCESS;
 115         }
 116 };
 117
 118 bool CBanComp(const CBan &ban1, const CBan &ban2)
 119 {
 120         return ((ban1.set_on + ban1.length) < (ban2.set_on + ban2.length));
 121 }
 122
 123 class ModuleCBan : public Module
 124 {
 125         cmd_cban* mycommand;
 126
 127
 128  public:
 129         ModuleCBan(InspIRCd* Me) : Module::Module(Me)
 130         {
 131
 132                 mycommand = new cmd_cban(Me);
 133                 ServerInstance->AddCommand(mycommand);
 134         }
 135
 136         void Implements(char* List)
 137         {
 138                 List[I_OnUserPreJoin] = List[I_OnSyncOtherMetaData] = List[I_OnDecodeMetaData] = List[I_OnStats] = 1;
 139         }
 140
 141         virtual int OnStats(char symbol, userrec* user, string_list &results)
 142         {
 143                 ExpireBans();
 144
 145                 if(symbol == 'C')
 146                 {
 147                         for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 148                         {
 149                                 unsigned long remaining = (iter->set_on + iter->length) - ServerInstance->Time();
 150                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 210 "+user->nick+" "+iter->chname.c_str()+" "+iter->set_by+" "+ConvToStr(iter->set_on)+" "+ConvToStr(iter->length)+" "+ConvToStr(remaining)+" :"+iter->reason);
 151                         }
 152                 }
 153
 154                 return 0;
 155         }
 156
 157         virtual int OnUserPreJoin(userrec *user, chanrec *chan, const char *cname)
 158         {
 159                 ExpireBans();
 160
 161                 /* check cbans in here, and apply as necessary. */
 162                 for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 163                 {
 164                         if(iter->chname == cname && !user->modes[UM_OPERATOR])
 165                         {
 166                                 // Channel is banned.
 167                                 user->WriteServ( "384 %s %s :Cannot join channel, CBANed (%s)", user->nick, cname, iter->reason.c_str());
 168                                 ServerInstance->WriteOpers("*** %s tried to join %s which is CBANed (%s)", user->nick, cname, iter->reason.c_str());
 169                                 return 1;
 170                         }
 171                 }
 172                 return 0;
 173         }
 174
 175         virtual void OnSyncOtherMetaData(Module* proto, void* opaque)
 176         {
 177                 for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 178                 {
 179                         proto->ProtoSendMetaData(opaque, TYPE_OTHER, NULL, "cban", EncodeCBan(*iter));
 180                 }
 181         }
 182
 183         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 184         {
 185                 if((target_type == TYPE_OTHER) && (extname == "cban"))
 186                 {
 187                         cbans.push_back(DecodeCBan(extdata));
 188                         std::sort(cbans.begin(), cbans.end(), CBanComp);
 189                 }
 190         }
 191
 192         virtual ~ModuleCBan()
 193         {
 194         }
 195
 196         virtual Version GetVersion()
 197         {
 198                 return Version(1,0,0,1,VF_VENDOR);
 199         }
 200
 201         std::string EncodeCBan(const CBan &ban)
 202         {
 203                 std::ostringstream stream;
 204                 stream << ban.chname << " " << ban.set_by << " " << ban.set_on << " " << ban.length << " " << ban.reason;
 205                 return stream.str();
 206         }
 207
 208         CBan DecodeCBan(const std::string &data)
 209         {
 210                 CBan res;
 211                 std::istringstream stream(data);
 212                 stream >> res.chname;
 213                 stream >> res.set_by;
 214                 stream >> res.set_on;
 215                 stream >> res.length;
 216                 res.reason = stream.str();
 217
 218                 return res;
 219         }
 220
 221         void ExpireBans()
 222         {
 223                 bool go_again = true;
 224
 225                 while (go_again)
 226                 {
 227                         go_again = false;
 228
 229                         for (cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 230                         {
 231                                 /* 0 == permanent, don't mess with them! -- w00t */
 232                                 if (iter->length != 0)
 233                                 {
 234                                         if (iter->set_on + iter->length <= ServerInstance->Time())
 235                                         {
 236                                                 ServerInstance->Log(DEBUG, "m_cban.so: Ban on %s expired, removing...", iter->chname.c_str());
 237                                                 ServerInstance->WriteOpers("*** %li second CBAN on %s (%s) set %u seconds ago expired", iter->length, iter->chname.c_str(), iter->reason.c_str(), ServerInstance->Time() - iter->set_on);
 238                                                 cbans.erase(iter);
 239                                                 go_again = true;
 240                                         }
 241                                 }
 242
 243                                 if (go_again == true)
 244                                         break;
 245                         }
 246                 }
 247         }
 248 };
 249
 250 class ModuleCBanFactory : public ModuleFactory
 251 {
 252  public:
 253         ModuleCBanFactory()
 254         {
 255         }
 256
 257         ~ModuleCBanFactory()
 258         {
 259         }
 260
 261         virtual Module * CreateModule(InspIRCd* Me)
 262         {
 263                 return new ModuleCBan(Me);
 264         }
 265
 266 };
 267
 268
 269 extern "C" void * init_module( void )
 270 {
 271         return new ModuleCBanFactory;
 272 }